A set of really simple commands to enable https over localhost for Mac
From paulbrowne.xyz
cd; mkdir .ssl
openssl req -newkey rsa:2048 -x509 -nodes -keyout .ssl/localhost.key -new -out .ssl/localhost.crt -subj /CN=localhost -reqexts SAN -extensions SAN -config <(cat /System/Library/OpenSSL/openssl.cnf <(printf '[SAN]\nsubjectAltName=DNS:localhost')) -sha256 -days 3650
sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain .ssl/localhost.crt